Remove code that sets |deltaX| and |deltaY| for WebKit gesture tap events

Once https://bugs.webkit.org/show_bug.cgi?id=92151 lands and is gardened in, WebKit
gesture tap events will use |boundingBox| instead of |deltaX| and |deltaY| to
determine the gesture's touch region, so these special cases may be removed.

BUG=138572


Review URL: https://chromiumcodereview.appspot.com/10830081

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@149432 0039d316-1c4b-4281-b951-d872f2087c98

content/browser/renderer_host/render_widget_host_view_win.cc

@@ -419,16 +419,6 @@ class LocalGestureEvent :
     data().deltaY = details.generic_y();
     data().type = ConvertToWebInputEvent(type_);
     data().boundingBox = details.bounding_box();
-
-    // WebKit gesture events do not have bounding-boxes yet, and expect the data
-    // in deltaX/deltaY instead (and instead of bounding box, WebKit expects the
-    // radius). This is currently used only for tap events. So special case this
-    // particular case.
-    // http://crbug.com/138572
-    if (type_ == ui::ET_GESTURE_TAP) {
-      data().deltaX = details.bounding_box().width() / 2;
-      data().deltaY = details.bounding_box().height() / 2;
-    }
   }
 
   virtual int GetLowestTouchId() const OVERRIDE {

content/browser/renderer_host/web_input_event_aurax11.cc

@@ -414,16 +414,6 @@ WebKit::WebGestureEvent MakeWebGestureEventFromAuraEvent(
   gesture_event.deltaY = event->details().generic_y();
   gesture_event.modifiers = EventFlagsToWebEventModifiers(event->flags());
 
-  // WebKit gesture events do not have bounding-boxes yet, and expect the data
-  // in deltaX/deltaY instead (and instead of bounding box, WebKit expects the
-  // radius). This is currently used only for tap events. So special case this
-  // particular case.
-  // http://crbug.com/138572
-  if (event->type() == ui::ET_GESTURE_TAP) {
-    gesture_event.deltaX = event->details().bounding_box().width() / 2;
-    gesture_event.deltaY = event->details().bounding_box().height() / 2;
-  }
-
   return gesture_event;
 }